CN108832788B - Rotor core, rotor and motor - Google Patents
Rotor core, rotor and motor Download PDFInfo
- Publication number
- CN108832788B CN108832788B CN201810777932.5A CN201810777932A CN108832788B CN 108832788 B CN108832788 B CN 108832788B CN 201810777932 A CN201810777932 A CN 201810777932A CN 108832788 B CN108832788 B CN 108832788B
- Authority
- CN
- China
- Prior art keywords
- rotor
- core
- groove
- rotor core
- face
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000002093 peripheral effect Effects 0.000 claims abstract description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 19
- 241000555745 Sciuridae Species 0.000 claims description 6
- 238000000034 method Methods 0.000 abstract description 8
- 230000008569 process Effects 0.000 abstract description 8
- 239000011162 core material Substances 0.000 description 59
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 21
- 229910052782 aluminium Inorganic materials 0.000 description 21
- 238000004080 punching Methods 0.000 description 14
- 238000004364 calculation method Methods 0.000 description 6
- 230000017525 heat dissipation Effects 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 239000004020 conductor Substances 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000006698 induction Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- NAWXUBYGYWOOIX-SFHVURJKSA-N (2s)-2-[[4-[2-(2,4-diaminoquinazolin-6-yl)ethyl]benzoyl]amino]-4-methylidenepentanedioic acid Chemical compound C1=CC2=NC(N)=NC(N)=C2C=C1CCC1=CC=C(C(=O)N[C@@H](CC(=C)C(O)=O)C(O)=O)C=C1 NAWXUBYGYWOOIX-SFHVURJKSA-N 0.000 description 1
- 229910000976 Electrical steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 210000004027 cell Anatomy 0.000 description 1
- 210000005056 cell body Anatomy 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K17/00—Asynchronous induction motors; Asynchronous induction generators
- H02K17/02—Asynchronous induction motors
- H02K17/16—Asynchronous induction motors having rotors with internally short-circuited windings, e.g. cage rotors
Abstract
The invention provides a rotor core, a rotor and a motor. The rotor core comprises a core body, wherein the core body is provided with a first end face and a second end face along the axial direction of the core body, a plurality of grooves are formed in the peripheral wall of the core body, and the depth of the groove body of each groove is gradually increased from the first end face to the second end face. According to the rotor core, the rotor and the motor, when the guide bars are matched with the grooves, the mechanical strength of the guide bars can be obviously improved, the guide bars are prevented from being broken in the operation process of the motor, the heat load of the guide bars can be reduced, the excessive temperature rise of the guide bars caused by heat concentration is avoided, and the operation stability of the motor is improved.
Description
Technical Field
The invention belongs to the technical field of motor manufacturing, and particularly relates to a rotor core, a rotor and a motor.
Background
As is known from the principle of operation of an electric motor, when the torque is constant, the output of the electric motor is proportional to the rotational speed, i.e., by increasing the rotational speed, the output of the electric motor can be increased. The high-speed motor has the advantages of high efficiency, high power density, small volume, no speed increasing box and the like, and has become a research hot spot in recent years. The high-speed motor is widely applied to the fields of high-speed grinding machines and other processing machine tools, high-speed flywheel energy storage systems, centrifugal compressors and blowers adopted in natural gas pipelines, vacuum pumps in analysis equipment and the like.
High-speed induction motors are the main type of choice for high-speed motors due to their good mechanical strength and electromagnetic properties. High speed induction motors suffer from a number of disadvantages:
(1) Because the motor rotor has high speed and large centrifugal force, the cast aluminum guide bar is easily broken under the action of higher stress in the operation process, and electric safety accidents are caused;
(2) Because the motor has high output power and high loss density under the high-speed condition, the heating problem is serious, the heat dissipation is difficult, and the stable operation and the service life of the motor are affected;
(3) The harmonic current content in the cast aluminum conducting bars in the motor is high, a harmonic magnetic field is formed, high stray loss and electromagnetic noise are caused, and the motor performance is affected.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to provide a rotor iron core, a rotor and a motor, when the rotor iron core, the rotor and the motor are matched with a groove, the mechanical strength of the guide bar can be obviously improved, the guide bar is prevented from being broken in the running process of the motor, the heat load of the guide bar can be reduced, the overhigh temperature rise of the guide bar caused by heat concentration is avoided, and the running stability of the motor is improved.
In order to solve the above problems, the present invention provides a rotor core, which includes a core body, wherein the core body has a first end face and a second end face along an axial direction of the core body, a plurality of grooves are configured on a peripheral wall of the core body, and a depth of a groove body of the grooves gradually increases from the first end face toward the second end face.
Preferably, the core body is formed by stacking a plurality of punched sheets, the punched sheets have punched grooves, and the plurality of punched grooves form a plurality of grooves in an axial direction of the core body.
Preferably, the axial thickness of the core body is m, the groove has a first symmetry plane in the radial direction of the core body, the groove is symmetrical about the first symmetry plane, a groove bottom wall of the groove intersects with the first symmetry plane to form a first arc line, a distance from any point B on the first arc line to the first end face is x, an amplitude of an increasing rate of the depth of the groove is a, l=2m, and a groove depth increasing rate y of the point B has the following relationship with x:
preferably, A is greater than or equal to 0.2.
Preferably, A is 0.3.ltoreq.A.ltoreq.0.4.
Preferably, the groove on the first end face has a first cross section with an area S 0 The groove where the point B is located has a second cross section S, S 0 There is a relationship with S as follows,
S＝y 2 ·S 0 。
the invention also provides a rotor comprising the rotor core.
Preferably, the rotor further comprises a squirrel cage structure, the squirrel cage structure comprises a plurality of guide bars, the guide bars are correspondingly embedded in the grooves, and the shape of the outer peripheral wall of each guide bar is matched with the shape of the inner wall of each groove.
Preferably, the number of the rotor cores is at least two, namely a first rotor core and a second rotor core, and the second end face of the first rotor core is in opposite contact connection with the second end face of the second rotor core.
Preferably, the number of the rotor cores is at least two, namely a first rotor core and a second rotor core, and the first end face of the first rotor core is in opposite contact connection with the first end face of the second rotor core.
The invention also provides a motor comprising the rotor.
According to the rotor iron core, the rotor and the motor provided by the invention, as the depth of the groove body of the groove is gradually increased along with the length of the iron core body, when the iron core is assembled with the guide bars in a matching way, the corresponding height of the guide bars is also gradually increased, compared with the guide bars which are common in the prior art and have the same height along the length direction, the mechanical strength of the guide bars is greatly improved, the guide bars can be certainly prevented from being broken in the motor operation process, so that the operation reliability of the corresponding motor is ensured, and the understanding that the cross section area of the groove is also naturally and correspondingly increased due to the gradual increase of the groove depth of the groove, and the cross section area of the guide bars which are correspondingly matched with the groove is also adaptively increased, so that the reduction of the thermal load in the guide bars is obviously facilitated, the over-high temperature rise of the guide bars caused by heat concentration can be effectively avoided, and the operation stability of the motor is improved.
Drawings
Fig. 1 is a schematic perspective view of a rotor core according to an embodiment of the present invention;
fig. 2 is a schematic structural view of a punched sheet of a rotor core according to still another embodiment of the present invention;
fig. 3 is a schematic perspective view of a guide bar of a rotor core according to still another embodiment of the present invention;
fig. 4 is a schematic perspective view of a rotor according to an embodiment of the present invention;
fig. 5 is a schematic diagram showing the correlation change between y and x when the second end faces of two rotor cores are in contact connection with each other in the rotor according to another embodiment of the present invention;
fig. 6 is a schematic view showing the correlation change between y and x when the first end faces of two rotor cores are in contact connection with each other in the rotor according to still another embodiment of the present invention.
The reference numerals are expressed as:
1. an iron core body; 11. a first end face; 12. a second end face; 13. a groove; 14. punching; 141. notching; 2. a conducting bar; 31. a first rotor core; 32. a second rotor core; 4. an end ring.
Detailed Description
Referring to fig. 1 to 6 in combination, according to an embodiment of the present invention, there is provided a rotor core including a core body 1, the core body 1 having a first end face 11 and a second end face 12 along an axial direction of the core body 1, a plurality of grooves 13 being configured on a peripheral wall of the core body 1, the grooves 13 penetrating the first end face 11 and the second end face 12 along an axis of the core body 1, a depth of a groove body of the grooves 13 gradually increasing from the first end face 11 toward the second end face 12. It will be appreciated that, since the outer peripheral wall of the core body 1 is cylindrical, the depth of the slot in this embodiment refers to the maximum depth from the outer edge of the notch of the groove 13 to the bottom of the groove 13. In this technical scheme, because the cell body degree of depth of recess 13 is along with the length of iron core body 1 increases gradually, thereby makes when iron core and conducting bar 2 match the equipment, the corresponding height of conducting bar 2 also increases gradually, compare with the conducting bar that has the same height along its length direction commonly in the prior art, its mechanical strength obtains very big improvement, this can certainly prevent the conducting bar fracture in the motor operation process, thereby guaranteed the reliability of corresponding motor operation, it is understood that because the gradual increase of the cell depth of recess 13, its cross-sectional area also naturally increases correspondingly, the cross-sectional area of conducting bar 2 that matches with it will also adaptability increase, this is obviously favorable to the reduction of thermal load in the conducting bar, can effectively avoid the conducting bar to cause the temperature rise too high because of heat concentrate, improve the stability of motor operation.
As a specific embodiment of the core body 1, preferably, the core body 1 is formed by stacking a plurality of punching sheets 14, the punching sheets 14 have punching grooves 141, a plurality of the punching grooves 141 form a plurality of the grooves 13 in the axial direction of the core body 1, the grooves 13 are formed by sequentially aligning the plurality of punching grooves 141 in the axial direction of the core body 1, so that the implementation process is simplified, the flexibility is high, the versatility is higher, it is understood that the groove depth of the punching grooves 141 of the plurality of punching sheets 14 is gradually increased in the axial direction of the core body 1, specifically, based on the punching grooves 141 of the punching sheets 14 located at the first end face 11, the groove depth of the punching grooves 141 of the punching sheets 14 stacked therewith is larger than that of the first end face 11, and so on along the axial direction of the core body 1.
In order to further optimize the rule of variation of the depth of the slot body of the slot 13, further, the axial thickness of the core body 1 is m, the slot 13 has a first symmetry plane located in the radial direction of the core body 1, the slot 13 is symmetrical about the first symmetry plane, the slot bottom wall of the slot 13 intersects with the first symmetry plane to form a first arc, the distance from any point B on the first arc to the first end face 11 is x, it can be understood that the point B can also be regarded as the corresponding point on the guide bar 2 matched with the corresponding position in the slot 13, the increasing rate amplitude of the depth of the slot body of the slot 13 is a, l=2m, and the increasing rate y of the depth of the point B has the following relationship with the x:
at this time, the sinusoidal period of the above formula is matched with the thickness m of the core body 1, so that the grooves 13 will follow the sinusoidal curve to be thickened gradually, it can be understood that the height change of the matched conducting bar 2 is smoother, and the occurrence of stress concentration points of the conducting bar 2 can be effectively prevented. Further, A is more than or equal to 0.2, and preferably, A is more than or equal to 0.3 and less than or equal to 0.4, so as to ensure that y is not lower than 1.2, thereby further improving the mechanical strength, particularly the deflection, of the conducting bar 2 and greatly reducing the tooth harmonic magnetic potential. Preferably, the groove 13 on the first end face 11 has a first cross section with an area S 0 The groove 13 at the point B has a second cross section S, S 0 There is a relationship with S as follows,
S＝y 2 ·S 0 (2)
in order to make the technical effect of this structure more clear, the following description will be made in detail with reference to the guide bar 2 and the related theoretical knowledge.
Taking the material of the guide bar 2 as cast aluminum as an example, in the aspect of improving the mechanical strength of the guide bar 2, when the high-speed motor operates, the calculation formula of the deflection K of the cast aluminum guide bar is as follows:
wherein l=2m; f is the average stress load born by the guide bar in unit length; e is the elastic modulus of cast aluminum; SI is the cross-sectional moment of inertia of the cast aluminum guide bar.
The section moment of inertia of the cast aluminum guide bar is obtained by adopting the following formula:
SI＝∫∫D dSdI (4)
wherein dS is the average sectional area of the cast aluminum guide bar in unit length; d is the distance from the section infinitesimal to the section neutral point on the section of the conducting bar.
From the above, the above-mentioned S and S 0 There is a relationship as shown in formula (2) so that the resultant cross-sectional moment of inertia is greater than that of a conventional rotor in which the original die (i.e., the die 14 on the first end face 11) is cast out of the aluminum without processing, thereby improving the mechanical strength of the bar 2, particularly the bending rigidity of the cast aluminum barAnd deflection, when A is more than or equal to 0.2, y is not lower than 1.2, and breakage of rotor bars can be further avoided, so that the deflection of the cast aluminum rotor adopting the technical scheme of the invention is higher than that of a common rotor by more than 30%.
In the aspect of facilitating heat dissipation, compared with a common cast aluminum strip, the cast aluminum strip adopting the technical scheme of the invention has larger sectional area of the strip 2 in unit length, and the calculation formula of the strip resistance delta R in unit length is as follows:
where ρ is the resistivity of the conductive strip and I is the induced current in the conductive strip.
The unit resistance value of the conducting bar 2 in the technical scheme of the invention is lower, and the heating value delta Q formula of the conducting bar 2 in unit length is as follows:
ΔQ＝I·ΔR 2 (6)
therefore, the conducting bar 2 in the technical scheme of the invention has lower heating value, and the heat concentration caused by excessive heating of the conducting bar which is difficult to radiate is avoided.
Meanwhile, the heat conductivity of the aluminum material used for the cast aluminum guide bar is 238W/(m.K), and the heat conductivity of the silicon steel material used for the iron core is 24.5W/(m.K), so that the heat conductivity of the aluminum material is far higher than that of the iron core material, the heat dissipation capacity of the cast aluminum guide bar is far higher than that of the rotor iron core, the heat of the cast aluminum guide bar is conducted to the end ring 4, the cast aluminum end ring 4 is provided with a fin fan blade structure, the heat dissipation capacity can be realized through the rotation of the fin structure, the heat accumulation on the cast aluminum guide bar is not easy to occur, the iron core body 1 adopts a lamination structure (namely, a plurality of punching sheets 14 are laminated to form), the insulating layer is arranged between each punching sheet, the heat dissipation effect is poor, a large amount of heat is easy to accumulate on the iron core, and the contact area between the guide bar 2 and the iron core body 1 is increased by adopting the rotor iron core provided with the invention, so that the accumulated heat on the iron core can be effectively dissipated, and the heat accumulation on one place is avoided, so that the safety problem is avoided.
In terms of eliminating harmonic electromagnetic noise, due to the conductors 2The section lengths of the small sections are different from each other and are distributed in a sine way in the axial direction, and the resistance R of the unit length of the conducting bar 2 can be obtained by combining the calculation formula (2) and the calculation formula (5) 0 The calculation formula of (2) is as follows:
the calculation formula of the electromotive force dU across the conductor 2 per unit length is as follows:
the total potential U across the conductors 2 is the sum of the potentials of the conductors 2 per unit length, namely:
where ka is a variable cross-section factor, which can be derived by the following formula:
as can be seen from the formula (10), ka < 1, the electromotive force of the conducting bar 2 adopting the technical scheme of the invention is smaller than that of the common cast aluminum rotor conducting bar.
And for the u-harmonic electromotive force, the variable cross-section factor kau is expressed as follows:
in order to weaken the first-order and second-order tooth harmonic potentials of electromagnetic noise generated in the motor, A is more than or equal to 0.3 and less than or equal to 0.4, so that tooth harmonic magnetic potential is greatly reduced, harmonic potential in the high-speed induction motor is reduced to reduce stray loss, and harmonic electromagnetic noise is eliminated.
According to an embodiment of the present invention, there is also provided a rotor including the above rotor core. Preferably, the rotor further comprises a squirrel cage structure, the squirrel cage structure comprises a plurality of conducting bars 2, the conducting bars 2 are correspondingly embedded in the grooves 13, the conducting bars 2 are connected between the two end rings 4, and the shape of the outer peripheral wall of the conducting bars 2 is matched with the shape of the inner wall of the grooves 13. Further, at least two rotor cores, namely, a first rotor core 31 and a second rotor core 32, are provided, and the second end face 12 of the first rotor core 31 and the second end face 12 of the second rotor core 32 are in contact with each other (the corresponding change relationship between the B-point groove depth increasing ratio y and x is shown in fig. 5), and in this case, it can be considered that the groove 13 of the rotor core has a structure with small ends and large middle.
Alternatively, at least two of the rotor cores may be a first rotor core 31 and a second rotor core 32, and the first end face 11 of the first rotor core 31 and the first end face 11 of the second rotor core 32 may be in contact with each other (the corresponding relationship between the B-point groove depth increasing ratio y and x is shown in fig. 6), and in this case, the rotor core may be considered to have a structure in which the groove 13 is large at both ends and small in the middle. The rotor adopts the iron core structure, so that the mechanical strength of the conducting bars can be obviously improved, the conducting bars are prevented from being broken in the running process of the motor, the heat load of the conducting bars can be reduced, the conducting bars are prevented from being excessively high in temperature rise caused by heat concentration, and the running stability of the motor is improved
According to an embodiment of the present invention, there is also provided an electric machine including the rotor described above. The motor adopts the rotor, so that the mechanical strength of the conducting bars can be obviously improved, the conducting bars are prevented from being broken in the operation process of the motor, the heat load of the conducting bars can be reduced, the conducting bars are prevented from being excessively high in temperature rise caused by heat concentration, and the operation stability of the motor is improved
It will be readily appreciated by those skilled in the art that the above advantageous ways can be freely combined and superimposed without conflict.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention. The foregoing is merely a preferred embodiment of the present invention, and it should be noted that it will be apparent to those skilled in the art that modifications and variations can be made without departing from the technical principles of the present invention, and these modifications and variations should also be regarded as the scope of the invention.
Claims (8)
1. The rotor core is characterized by comprising a core body (1), wherein the core body (1) is provided with a first end face (11) and a second end face (12) along the axial direction of the core body (1), a plurality of grooves (13) are formed in the peripheral wall of the core body (1), and the depth of the groove body of the grooves (13) is gradually increased from the first end face (11) to the second end face (12); the axial thickness of the iron core body (1) is m, the groove (13) is provided with a first symmetrical surface in the radial direction of the iron core body (1), the groove (13) is symmetrical about the first symmetrical surface, a groove bottom wall of the groove (13) is intersected with the first symmetrical surface to form a first arc line, the distance from any point B on the first arc line to the first end face (11) is x, the amplitude of the increasing ratio of the groove depth of the groove (13) is A, and the groove depth increasing ratio y of the point B and the x have the following relation:
,
the groove (13) on the first end face (11) has a first cross section with an area S 0 The groove (13) where the point B is located has a second cross section S, S 0 There is a relationship with S as follows,。
2. the rotor core according to claim 1, characterized in that the core body (1) is formed by stacking a plurality of punched sheets (14), the punched sheets (14) having punched grooves (141), the plurality of punched grooves (141) forming a plurality of the grooves in the axial direction of the core body (1).
3. The rotor core according to claim 1, wherein 0.3.ltoreq.a.ltoreq.0.4.
4. A rotor comprising a rotor core, characterized in that the rotor core is the rotor core according to any one of claims 1 to 3.
5. The rotor as recited in claim 4, further comprising a squirrel cage structure, wherein the squirrel cage structure comprises a plurality of guide bars (2), the guide bars (2) are correspondingly embedded in the grooves (13), and the shape of the outer peripheral wall of the guide bars (2) is matched with the shape of the inner wall of the grooves (13).
6. The rotor according to claim 5, wherein at least two rotor cores are provided, namely a first rotor core (31) and a second rotor core (32), and the second end surface (12) of the first rotor core (31) is in contact connection with the second end surface (12) of the second rotor core (32).
7. The rotor according to claim 5, wherein at least two rotor cores are respectively a first rotor core (31) and a second rotor core (32), and a first end surface (11) of the first rotor core (31) is in contact connection with a first end surface (11) of the second rotor core (32).
8. An electric machine comprising a rotor, characterized in that the rotor is a rotor according to any one of claims 4 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810777932.5A CN108832788B (en) | 2018-07-16 | 2018-07-16 | Rotor core, rotor and motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810777932.5A CN108832788B (en) | 2018-07-16 | 2018-07-16 | Rotor core, rotor and motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108832788A CN108832788A (en) | 2018-11-16 |
| CN108832788B true CN108832788B (en) | 2024-04-12 |
Family
ID=64139550
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810777932.5A Active CN108832788B (en) | 2018-07-16 | 2018-07-16 | Rotor core, rotor and motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108832788B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN209419452U (en) * | 2019-01-05 | 2019-09-20 | 中山大洋电机股份有限公司 | A kind of rotor assembly and its motor of application |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2101340U (en) * | 1991-08-08 | 1992-04-08 | 王胜五 | Deep channel type squirrel-cage rotor bar-broken preventing structure |
| KR20130056980A (en) * | 2011-11-23 | 2013-05-31 | 한국전기연구원 | Squirrel cage rotor of induction motor |
| CN204376662U (en) * | 2015-01-26 | 2015-06-03 | 广东美芝制冷设备有限公司 | Rotor and the compressor with it |
| JP2016201902A (en) * | 2015-04-10 | 2016-12-01 | 株式会社日立製作所 | Induction machine, and induction machine drive system and railway vehicle that use the same |
| CN208337373U (en) * | 2018-07-16 | 2019-01-04 | 珠海格力电器股份有限公司 | Rotor core, rotor, motor |
-
2018
- 2018-07-16 CN CN201810777932.5A patent/CN108832788B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2101340U (en) * | 1991-08-08 | 1992-04-08 | 王胜五 | Deep channel type squirrel-cage rotor bar-broken preventing structure |
| KR20130056980A (en) * | 2011-11-23 | 2013-05-31 | 한국전기연구원 | Squirrel cage rotor of induction motor |
| CN204376662U (en) * | 2015-01-26 | 2015-06-03 | 广东美芝制冷设备有限公司 | Rotor and the compressor with it |
| JP2016201902A (en) * | 2015-04-10 | 2016-12-01 | 株式会社日立製作所 | Induction machine, and induction machine drive system and railway vehicle that use the same |
| CN208337373U (en) * | 2018-07-16 | 2019-01-04 | 珠海格力电器股份有限公司 | Rotor core, rotor, motor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108832788A (en) | 2018-11-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110999033B (en) | Motor | |
| WO2017202320A1 (en) | Motor rotor, motor, and electric vehicle | |
| CN108832788B (en) | Rotor core, rotor and motor | |
| WO2016002012A1 (en) | Rotor, electric motor, compressor, and fan | |
| WO2017202318A1 (en) | Punching plate for motor rotor, motor rotor, motor, and electric vehicle | |
| WO2017202319A1 (en) | Permanent magnet synchronous motor and electric vehicle | |
| CN113422446B (en) | New energy automobile permanent magnet synchronous oil-cooled motor and stator inner diameter size design method | |
| CN208337373U (en) | Rotor core, rotor, motor | |
| CN214429439U (en) | Permanent magnet and outer rotor permanent magnet motor | |
| CN113765240A (en) | Motor, compressor and refrigeration plant | |
| CN212969396U (en) | Rotor punching sheet, squirrel-cage rotor, motor and compressor | |
| CN209088648U (en) | Rotor, permanent magnet synchronous motor and compressor | |
| CN217508375U (en) | Motor rotor and motor | |
| CN110460181A (en) | Cage rotor, motor and electric equipment products | |
| CN206790232U (en) | Stator, motor, compressor and refrigeration plant | |
| CN210404873U (en) | Squirrel-cage rotor, motor and electric appliance product | |
| CN104953778B (en) | Induction conductivity | |
| CN112003399A (en) | Rotor, motor, compressor, air conditioner and vehicle | |
| CN110729833A (en) | Motor rotor and synchronous reluctance motor | |
| CN113765244B (en) | Design method of three-phase motor stator | |
| JP2011010498A (en) | Dynamo-electric machine | |
| CN215300303U (en) | Tangential rotor and permanent magnet motor | |
| CN115706477A (en) | Stainless steel switch reluctance motor | |
| CN216819526U (en) | Motor rotor and self-starting synchronous reluctance motor and compressor thereof | |
| CN215580846U (en) | Cast-aluminum rotor silicon steel sheet and rotor adopting same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |